Display screen or a portion thereof with graphical user interface



The FIGURE is a front view of a display screen or a portion thereof with graphical user interface showing my new design.

The long-short broken lines showing a display screen or portion thereof illustrates environmental structure. The short-short broken lines represent portions of the graphical user interface. The broken lines form no part of the claimed design. 

CLAIM The ornamental design for a display screen or a portion thereof with graphical user interface, as shown and described. 